"And what's your theory on marriage?" she asked Levine, which prompted coach Blake Shelton to shift himself on the couch in order to catch the answer.

"Hearing Blake talk about it, it's great. I'm a fan of marriage," the Maroon 5 frontman, who's dating began. "People think that I keep pooh poohing marriage and I love it and I want to probably be married at some point."

"I don't feel pressured to get married," he continued. "I think a lot of people put pressure on themselves to get married and I think that when it's time, it's going to be obvious, and I'm going to do it, and I'm going to really enjoy it. I love kids, I love the idea of having a wife. I don't have one yet."

She also wondered if new coaches Usher and Shakira took any credit for "The Voice's" increased viewership this season, which led to ratings wins over Fox's "American Idol."

"Oh, I don't want to claim that we're guilty of all charges here but I do feel that there is a special chemistry between us four," Shakira said.

Winfrey also spoke to Shakira about the challenges of motherhood, Usher's experience growing up in the spotlight and spent some time with host Carson Daly, social media correspondent Christina Milian and executive producer Mark Burnett.